Well really it is simple a sapper that hacks buildings and turns them against their team the downsides are that the time it takes to hack the sentry is the same amount of time it takes to normally destroy a sentry.

The downside is that the time it takes for the sentry to switch sides is the same as the time it would take a normal sapper to destroy it.

How is that a downside if it's identical to normal sapper behavior?

Technically, it's not a downside that'd be written on the weapon's stats, but if the sapper was destroyed, the hack wouldn't work and nothing would happen, whereas with the sapper there'd be damage done that the engie would have to repair.

Well, that's what I'm assuming he means anyway. Not taking any sides here, just interpreting OP so don't shout at me about it.

Well really it is simple a sapper that hacks buildings and turns them against their team the downsides are that the time it takes to hack the sentry is the same amount of time it takes to normally destroy a sentry.

I play as engie quite often and this idea makes me shudder. I already have to make sure I'm not standing in front of the sentry if it starts firing at approaching enemies and I'm not sure if I'd like to have to worry about having it turned against me and my teammates.